This weekend, the waters off Searsport and Stonington will play host to lobster boat races.Lobster boat racing season started last month with ten races on the schedule until the end of August.The racers compete in different classes, divided according to boat length and horse power. Saturday’s race will take place in Searsport. Sunday’s is set for Stonington. You can check out the schedule for the season at www.lobsterboatracing.com. Even though there are prizes up for grabs, organizers say the contests are really about earning bragging rights.